<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "DTD/xhtml1-strict.dtd">
<html><head><title>QRadialGradient Class Reference</title><style>h3.fn,span.fn { margin-left: 1cm; text-indent: -1cm }
a:link { color: #004faf; text-decoration: none }
a:visited { color: #672967; text-decoration: none }
td.postheader { font-family: sans-serif }
tr.address { font-family: sans-serif }
body { background: #ffffff; color: black; }
</style></head><body><table border="0" cellpadding="0" cellspacing="0" width="100%"><tr /><td align="left" valign="top" width="32"><img align="left" border="0" height="32" src="images/rb-logo.png" width="32" /></td><td width="1">&#160;&#160;</td><td class="postheader" valign="center"><a href="index.html"><font color="#004faf">Home</font></a>&#160;&#183; <a href="classes.html"><font color="#004faf">All Classes</font></a>&#160;&#183; <a href="modules.html"><font color="#004faf">Modules</font></a></td></table><h1 align="center">QRadialGradient Class Reference<br /><sup><sup>[<a href="qtgui.html">QtGui</a> module]</sup></sup></h1><p>The QRadialGradient class is used in combination with <a href="qbrush.html">QBrush</a> to specify a radial gradient brush.
<a href="#details">More...</a></p>

<p>Inherits <a href="qgradient.html">QGradient</a>.</p><h3>Methods</h3><ul><li><div class="fn" /><b><a href="qradialgradient.html#QRadialGradient">__init__</a></b> (<i>self</i>)</li><li><div class="fn" /><b><a href="qradialgradient.html#QRadialGradient-2">__init__</a></b> (<i>self</i>, QPointF&#160;<i>center</i>, float&#160;<i>radius</i>, QPointF&#160;<i>focalPoint</i>)</li><li><div class="fn" /><b><a href="qradialgradient.html#QRadialGradient-3">__init__</a></b> (<i>self</i>, QPointF&#160;<i>center</i>, float&#160;<i>centerRadius</i>, QPointF&#160;<i>focalPoint</i>, float&#160;<i>focalRadius</i>)</li><li><div class="fn" /><b><a href="qradialgradient.html#QRadialGradient-4">__init__</a></b> (<i>self</i>, QPointF&#160;<i>center</i>, float&#160;<i>radius</i>)</li><li><div class="fn" /><b><a href="qradialgradient.html#QRadialGradient-5">__init__</a></b> (<i>self</i>, float&#160;<i>cx</i>, float&#160;<i>cy</i>, float&#160;<i>radius</i>, float&#160;<i>fx</i>, float&#160;<i>fy</i>)</li><li><div class="fn" /><b><a href="qradialgradient.html#QRadialGradient-6">__init__</a></b> (<i>self</i>, float&#160;<i>cx</i>, float&#160;<i>cy</i>, float&#160;<i>centerRadius</i>, float&#160;<i>fx</i>, float&#160;<i>fy</i>, float&#160;<i>focalRadius</i>)</li><li><div class="fn" /><b><a href="qradialgradient.html#QRadialGradient-7">__init__</a></b> (<i>self</i>, float&#160;<i>cx</i>, float&#160;<i>cy</i>, float&#160;<i>radius</i>)</li><li><div class="fn" /><b><a href="qradialgradient.html#QRadialGradient-8">__init__</a></b> (<i>self</i>, QRadialGradient)</li><li><div class="fn" />QPointF <b><a href="qradialgradient.html#center">center</a></b> (<i>self</i>)</li><li><div class="fn" />float <b><a href="qradialgradient.html#centerRadius">centerRadius</a></b> (<i>self</i>)</li><li><div class="fn" />QPointF <b><a href="qradialgradient.html#focalPoint">focalPoint</a></b> (<i>self</i>)</li><li><div class="fn" />float <b><a href="qradialgradient.html#focalRadius">focalRadius</a></b> (<i>self</i>)</li><li><div class="fn" />float <b><a href="qradialgradient.html#radius">radius</a></b> (<i>self</i>)</li><li><div class="fn" /><b><a href="qradialgradient.html#setCenter">setCenter</a></b> (<i>self</i>, QPointF&#160;<i>center</i>)</li><li><div class="fn" /><b><a href="qradialgradient.html#setCenter-2">setCenter</a></b> (<i>self</i>, float&#160;<i>x</i>, float&#160;<i>y</i>)</li><li><div class="fn" /><b><a href="qradialgradient.html#setCenterRadius">setCenterRadius</a></b> (<i>self</i>, float&#160;<i>radius</i>)</li><li><div class="fn" /><b><a href="qradialgradient.html#setFocalPoint">setFocalPoint</a></b> (<i>self</i>, QPointF&#160;<i>focalPoint</i>)</li><li><div class="fn" /><b><a href="qradialgradient.html#setFocalPoint-2">setFocalPoint</a></b> (<i>self</i>, float&#160;<i>x</i>, float&#160;<i>y</i>)</li><li><div class="fn" /><b><a href="qradialgradient.html#setFocalRadius">setFocalRadius</a></b> (<i>self</i>, float&#160;<i>radius</i>)</li><li><div class="fn" /><b><a href="qradialgradient.html#setRadius">setRadius</a></b> (<i>self</i>, float&#160;<i>radius</i>)</li></ul><a name="details" /><hr /><h2>Detailed Description</h2><p>The QRadialGradient class is used in combination with <a href="qbrush.html">QBrush</a> to specify a radial gradient brush.</p>
<p>Qt supports both simple and extended radial gradients.</p>
<p>Simple radial gradients interpolate colors between a focal point
and end points on a circle surrounding it. Extended radial
gradients interpolate colors between a focal circle and a center
circle. Points outside the cone defined by the two circles will be
transparent. For simple radial gradients the focal point is
adjusted to lie inside the center circle, whereas the focal point
can have any position in an extended radial gradient.</p>
<p>Outside the end points the gradient is either padded, reflected
or repeated depending on the currently set <a href="qgradient.html#Spread-enum">spread</a> method:</p>
<table class="generic">
<tr class="odd" valign="top">
<td><img alt="" src="images/qradialgradient-pad.png" /></td>
<td><img alt="" src="images/qradialgradient-reflect.png" /></td>
<td><img alt="" src="images/qradialgradient-repeat.png" /></td>
</tr>
<tr class="even" valign="top">
<td><a href="qgradient.html#Spread-enum">PadSpread</a>
(default)</td>
<td><a href="qgradient.html#Spread-enum">ReflectSpread</a></td>
<td><a href="qgradient.html#Spread-enum">RepeatSpread</a></td>
</tr>
</table>
<p>The colors in a gradient is defined using stop points of the
<a href="qgradient.html#QGradientStop-typedef">QGradientStop</a>
type, i.e. a position and a color. Use the <a href="qgradient.html#setColorAt">QGradient.setColorAt</a>() or the
<a href="qgradient.html#setStops">QGradient.setStops</a>()
function to define the stop points. It is the gradient's complete
set of stop points that describes how the gradient area should be
filled. If no stop points have been specified, a gradient of black
at 0 to white at 1 is used.</p>
<p>In addition to the functions inherited from <a href="qgradient.html">QGradient</a>, the QRadialGradient class provides
the <a href="qradialgradient.html#center">center</a>(), <a href="qradialgradient.html#focalPoint">focalPoint</a>() and <a href="qradialgradient.html#radius">radius</a>() functions returning the
gradient's center, focal point and radius respectively.</p>
<hr /><h2>Method Documentation</h2><h3 class="fn"><a name="QRadialGradient" />QRadialGradient.__init__ (<i>self</i>)</h3><p>Constructs a simple radial gradient with the center and focal
point at (0, 0) with a radius of 1.</p>


<h3 class="fn"><a name="QRadialGradient-2" />QRadialGradient.__init__ (<i>self</i>, <a href="qpointf.html">QPointF</a>&#160;<i>center</i>, float&#160;<i>radius</i>, <a href="qpointf.html">QPointF</a>&#160;<i>focalPoint</i>)</h3><p>Constructs a simple radial gradient with the given
<i>center</i>, <i>radius</i> and <i>focalPoint</i>.</p>
<p><b>Note:</b> If the given focal point is outside the circle
defined by the <i>center</i> point and <i>radius</i>, it will be
re-adjusted to lie at a point on the circle where it intersects
with the line from <i>center</i> to <i>focalPoint</i>.</p>
<p><b>See also</b> <a href="qgradient.html#setColorAt">QGradient.setColorAt</a>() and
<a href="qgradient.html#setStops">QGradient.setStops</a>().</p>


<h3 class="fn"><a name="QRadialGradient-3" />QRadialGradient.__init__ (<i>self</i>, <a href="qpointf.html">QPointF</a>&#160;<i>center</i>, float&#160;<i>centerRadius</i>, <a href="qpointf.html">QPointF</a>&#160;<i>focalPoint</i>, float&#160;<i>focalRadius</i>)</h3><p>Constructs a simple radial gradient with the given center
(<i>cx</i>, <i>cy</i>), <i>radius</i> and focal point (<i>fx</i>,
<i>fy</i>).</p>
<p><b>Note:</b> If the given focal point is outside the circle
defined by the center (<i>cx</i>, <i>cy</i>) and the <i>radius</i>
it will be re-adjusted to the intersection between the line from
the center to the focal point and the circle.</p>
<p><b>See also</b> <a href="qgradient.html#setColorAt">QGradient.setColorAt</a>() and
<a href="qgradient.html#setStops">QGradient.setStops</a>().</p>


<h3 class="fn"><a name="QRadialGradient-4" />QRadialGradient.__init__ (<i>self</i>, <a href="qpointf.html">QPointF</a>&#160;<i>center</i>, float&#160;<i>radius</i>)</h3><p>Constructs a simple radial gradient with the given
<i>center</i>, <i>radius</i> and the focal point in the circle
center.</p>
<p><b>See also</b> <a href="qgradient.html#setColorAt">QGradient.setColorAt</a>() and
<a href="qgradient.html#setStops">QGradient.setStops</a>().</p>


<h3 class="fn"><a name="QRadialGradient-5" />QRadialGradient.__init__ (<i>self</i>, float&#160;<i>cx</i>, float&#160;<i>cy</i>, float&#160;<i>radius</i>, float&#160;<i>fx</i>, float&#160;<i>fy</i>)</h3><p>Constructs a simple radial gradient with the center at
(<i>cx</i>, <i>cy</i>) and the specified <i>radius</i>. The focal
point lies at the center of the circle.</p>
<p><b>See also</b> <a href="qgradient.html#setColorAt">QGradient.setColorAt</a>() and
<a href="qgradient.html#setStops">QGradient.setStops</a>().</p>


<h3 class="fn"><a name="QRadialGradient-6" />QRadialGradient.__init__ (<i>self</i>, float&#160;<i>cx</i>, float&#160;<i>cy</i>, float&#160;<i>centerRadius</i>, float&#160;<i>fx</i>, float&#160;<i>fy</i>, float&#160;<i>focalRadius</i>)</h3><p>Constructs an extended radial gradient with the given
<i>center</i>, <i>centerRadius</i>, <i>focalPoint</i>, and
<i>focalRadius</i>.</p>
<p>This function was introduced in Qt 4.8.</p>


<h3 class="fn"><a name="QRadialGradient-7" />QRadialGradient.__init__ (<i>self</i>, float&#160;<i>cx</i>, float&#160;<i>cy</i>, float&#160;<i>radius</i>)</h3><p>Constructs an extended radial gradient with the given center
(<i>cx</i>, <i>cy</i>), center radius, <i>centerRadius</i>, focal
point, (<i>fx</i>, <i>fy</i>), and focal radius
<i>focalRadius</i>.</p>
<p>This function was introduced in Qt 4.8.</p>


<h3 class="fn"><a name="QRadialGradient-8" />QRadialGradient.__init__ (<i>self</i>, <a href="qradialgradient.html">QRadialGradient</a>)</h3><h3 class="fn"><a name="center" /><a href="qpointf.html">QPointF</a> QRadialGradient.center (<i>self</i>)</h3><p>Returns the center of this radial gradient in logical
coordinates.</p>
<p><b>See also</b> <a href="qradialgradient.html#setCenter">setCenter</a>() and <a href="qgradient.html#stops">QGradient.stops</a>().</p>


<h3 class="fn"><a name="centerRadius" />float QRadialGradient.centerRadius (<i>self</i>)</h3><p>Returns the center radius of this radial gradient in logical
coordinates.</p>
<p>This function was introduced in Qt 4.8.</p>
<p><b>See also</b> <a href="qradialgradient.html#setCenterRadius">setCenterRadius</a>() and
<a href="qgradient.html#stops">QGradient.stops</a>().</p>


<h3 class="fn"><a name="focalPoint" /><a href="qpointf.html">QPointF</a> QRadialGradient.focalPoint (<i>self</i>)</h3><p>Returns the focal point of this radial gradient in logical
coordinates.</p>
<p><b>See also</b> <a href="qradialgradient.html#setFocalPoint">setFocalPoint</a>() and
<a href="qgradient.html#stops">QGradient.stops</a>().</p>


<h3 class="fn"><a name="focalRadius" />float QRadialGradient.focalRadius (<i>self</i>)</h3><p>Returns the focal radius of this radial gradient in logical
coordinates.</p>
<p>This function was introduced in Qt 4.8.</p>
<p><b>See also</b> <a href="qradialgradient.html#setFocalRadius">setFocalRadius</a>() and
<a href="qgradient.html#stops">QGradient.stops</a>().</p>


<h3 class="fn"><a name="radius" />float QRadialGradient.radius (<i>self</i>)</h3><p>Returns the radius of this radial gradient in logical
coordinates.</p>
<p>Equivalent to <a href="qradialgradient.html#centerRadius">centerRadius</a>()</p>
<p><b>See also</b> <a href="qradialgradient.html#setRadius">setRadius</a>() and <a href="qgradient.html#stops">QGradient.stops</a>().</p>


<h3 class="fn"><a name="setCenter" />QRadialGradient.setCenter (<i>self</i>, <a href="qpointf.html">QPointF</a>&#160;<i>center</i>)</h3><p>Sets the center of this radial gradient in logical coordinates
to <i>center</i>.</p>
<p>This function was introduced in Qt 4.2.</p>
<p><b>See also</b> <a href="qradialgradient.html#center">center</a>().</p>


<h3 class="fn"><a name="setCenter-2" />QRadialGradient.setCenter (<i>self</i>, float&#160;<i>x</i>, float&#160;<i>y</i>)</h3><p>This is an overloaded function.</p>
<p>Sets the center of this radial gradient in logical coordinates
to (<i>x</i>, <i>y</i>).</p>
<p>This function was introduced in Qt 4.2.</p>
<p><b>See also</b> <a href="qradialgradient.html#center">center</a>().</p>


<h3 class="fn"><a name="setCenterRadius" />QRadialGradient.setCenterRadius (<i>self</i>, float&#160;<i>radius</i>)</h3><p>Sets the center radius of this radial gradient in logical
coordinates to <i>radius</i></p>
<p>This function was introduced in Qt 4.8.</p>
<p><b>See also</b> <a href="qradialgradient.html#centerRadius">centerRadius</a>().</p>


<h3 class="fn"><a name="setFocalPoint" />QRadialGradient.setFocalPoint (<i>self</i>, <a href="qpointf.html">QPointF</a>&#160;<i>focalPoint</i>)</h3><p>Sets the focal point of this radial gradient in logical
coordinates to <i>focalPoint</i>.</p>
<p>This function was introduced in Qt 4.2.</p>
<p><b>See also</b> <a href="qradialgradient.html#focalPoint">focalPoint</a>().</p>


<h3 class="fn"><a name="setFocalPoint-2" />QRadialGradient.setFocalPoint (<i>self</i>, float&#160;<i>x</i>, float&#160;<i>y</i>)</h3><p>This is an overloaded function.</p>
<p>Sets the focal point of this radial gradient in logical
coordinates to (<i>x</i>, <i>y</i>).</p>
<p>This function was introduced in Qt 4.2.</p>
<p><b>See also</b> <a href="qradialgradient.html#focalPoint">focalPoint</a>().</p>


<h3 class="fn"><a name="setFocalRadius" />QRadialGradient.setFocalRadius (<i>self</i>, float&#160;<i>radius</i>)</h3><p>Sets the focal radius of this radial gradient in logical
coordinates to <i>radius</i></p>
<p>This function was introduced in Qt 4.8.</p>
<p><b>See also</b> <a href="qradialgradient.html#focalRadius">focalRadius</a>().</p>


<h3 class="fn"><a name="setRadius" />QRadialGradient.setRadius (<i>self</i>, float&#160;<i>radius</i>)</h3><p>Sets the radius of this radial gradient in logical coordinates
to <i>radius</i></p>
<p>Equivalent to <a href="qradialgradient.html#setCenterRadius">setCenterRadius</a>()</p>
<p>This function was introduced in Qt 4.2.</p>
<p><b>See also</b> <a href="qradialgradient.html#radius">radius</a>().</p>
<address><hr /><div align="center"><table border="0" cellspacing="0" width="100%"><tr class="address"><td align="left" width="25%">PyQt&#160;snapshot-4.9.5-9eb6aac99275 for X11</td><td align="center" width="50%">Copyright &#169; <a href="http://www.riverbankcomputing.com">Riverbank&#160;Computing&#160;Ltd</a> and <a href="http://www.qtsoftware.com">Nokia</a> 2012</td><td align="right" width="25%">Qt&#160;4.8.3</td></tr></table></div></address></body></html>